included containers, revised zoom, changed scan method over functions

- included ToDo file
- included containers for actions that contain other bigger zoom level
actions (thanks to PlantUML development)
- major zoom rewriting
- changed the scan method over functions. Makeflows relies now on
build_db and it will only scan the functions/methods that appear there.
- included else if structures (thanks to PlantUML development)  —
excluded nested if stmt for the moment.
dummy